For the known planet, we put a lower limit on \(K\)  derived from the mass it would have if it were made of compressed water, with a radius of 1.528 \(R_{\oplus }\)  [1]} that is around 1.56 \(M_{\oplus }\)  (according to the Growth model interpretation of mass distribution proposed by [2]}), giving an RV amplitude of \(K_{min}\)  \(\sim \)  1.08 \({\rm ms^{-1}}\) . The upper limit was set to be about a physically-motivated number of \(K_{max}\)  \(\sim \)  10 m \(s^{-1}\)  corresponding to the 10 \(M_{\oplus }\)  expected for a pure iron planet of that size.
